Active microrheology of a bulk metallic glass

• Published in: Science advances Vol. 6; no. 29; p. eaba8766
• Main Authors: Yu, Ji Woong, Rahbari, S H E, Kawasaki, Takeshi, Park, Hyunggyu, Lee, Won Bo
• Format: Journal Article
• Language: English
• Published: United States American Association for the Advancement of Science 01.07.2020
• Subjects: Condensed Matter Physics; Materials Science; SciAdv r-articles
• ISSN: 2375-2548; 2375-2548
• DOI: 10.1126/sciadv.aba8766

The glass transition remains unclarified in condensed matter physics. Investigating the mechanical properties of glass is challenging because any global deformation that might result in shear rejuvenation would require a prohibitively long relaxation time. Moreover, glass is well known to be heterogeneous, and a global perturbation would prevent exploration of local mechanical/transport properties. However, investigation based on a local probe, i.e., microrheology, may overcome these problems. Here, we establish active microrheology of a bulk metallic glass, via a probe particle driven into host medium glass. This technique is amenable to experimental investigations via nanoindentation tests. We provide distinct evidence of a strong relationship between the microscopic dynamics of the probe particle and the macroscopic properties of the host medium glass. These findings establish active microrheology as a promising technique for investigating the local properties of bulk metallic glass.